Dental tumbler supply valve part



Dec. 7, 1943.

H. P. YslEGEl..

DENTAL TUMBLER SUPPLY VALVE PART Filed Sept. 24, 1941 INVEI?,

Patented Dec. 7, 1943 "UNITED "STATES OFFICE :DENTAL TUMBLER SUPPLYVALVE PART *Harry P. SiegelyBrooklymNfY.

Application September 24', 19.41,*Serial Nine-412,114

i l'Claim. -.('Cl'." 251.-132) This* invention .vrelates f to, fdentaliz'.tumblerzsupy .ply valve partfor usevon aidentalzcuspidorxture, and anobject of the invention-` is4 to proi `vide an -improved :valve ypart,Whichzis more 1convenientto. use; and-whichfcan be instantlyclosed or:`likewise 'opened .to .its fullicapacity. .Another A furtherobjectlofithe inventionis .to :provide a -valve part-.structure having adouble acting handlecapable -`ofibeing` `manually moved into a Xedposition at which the ow through theiie-V vice will be continuous, or ofbeing 4manually operated in one directiononly with automatic out-,olfYwhenintermittent iioW is desired. An-

other object of theinven-tion isto provide a `control handle for atumbler supply valve part' V vthat can be actuated by: a dentist withoutthe use ofv his ngers, such asl by his Wrist, or the Y handle vof aninstrument.

Heretofore. tumbler-supply. valves have been constructed to be openedandclosed by means of a threaded part turned by the ngers .of a 4dentist or his patient, and which `'is-,operative to regulate the rateof kiiow of water to the tumbler of the iixture. v Such'fiow regulating-means vare unsatisfactory, as they aref not only .slowacting I;

with respect to fullon or oi lpositions,'but .are awkward for a patientto manipulate, and are aisopotentially unsanitary forthe dentist.

Means are `provided for effectively packing `the leakage whenin use, andWithoutinterference with. the aforesaid :capacityi adjustingmeans. .Thestructure illustrated is .particularlyadaptable for replacementpurposeslwhere other slow operating valve parts are already inuse.

.Other features and advantages of the inven- .tionwill be hereinafterLdescribedzand Lclaimed.

The invention will. bel more fully. understood by reference to thedrawing forming a part of this specineanon.. and in which,

`handleiin closed and-open .positionsrespectivelm i following-certainadjustments `for intermittent operation of. the mechanism.

Referringfto thel drawing, and'particularly to Fig. 1,.thenumeralvlfrepresents a `dental cuspidor xturef having the customary wastevbowlII, tumbler I2, andl water supply inlet pipe. I3

.-leadingfrom. a..service line (not shown) `to a fitting-14 having. aport `I5 `(Fig.l 2) extending .from pipe -I3 through avalve Seat I6 to acham- .,ber II..in said fitting. 4Another port I8 leads ...from.chamberI1. .to a tumbler supply pipey I9 ...extending upwardlyV within thefixture, and' ter- ...minatingirra gooseneckl directlyabove the tumbler:I 2.

-..Referring more.. particularly to Fig. 2, the nu- .,meral..2|designatesin general my improved ...valve part which is adapted to beoperatively V.secured tothe tting I4.and provide more efficientmeanslforcontrolling the flow of water to 24 providedin.theadjacentend-of. thetting I4. ,.Ashoulder 25 is arranged to overlie the .outer end of thetting, and a gasket 26 there- 1 between provides for a` tight joint upontighteni ing of vthe threads.

"The other end ofthe housing 22 is provided Vwith exteriorthreads' 21for engagement with theintern'al threads 28 of a fulcrum cap 29. Initermediate its threaded ends, and adjacent the shoulderA 25`the` housing.22 maybe `of a lconfiguration.A suitable for the .application` .of a.valvepart of this -invention. againstgexternal L- Mthe ,joint at Ithegasket 26.

`wrench or other .tool appropriate for. tightening The valve part .2|includes a plungerelement `P"extending* through the housing` 22 beyondeither'end thereof, and consists of Aa cylindrical head' 30. and `anelongated/stem 3I. `The head A' 3i) is recessed at 32 for the snugreception there- V`in of a disk 33 made `of rubber or other suitable-elasticmateriaLwhich projects from the head 3i), and is provided wtih aflat surface 34 con- `stituting a valve vvface forengagement^with the Pin respect to its proper engagement with seat I6.

The other end of spring 31 bears against shoulder 35 of head 3U, and isthus effective to urge the plunger P in a direction in which the face 34will be pressed tightly against the seat I6. The strength of spring 31is far greater than the pressure of the water effective over therestricted area of the port l where it passes through seat I6, so thatthe disk 33 when seated will not only provide a tight joint, but one inwhich the sealing pressure will be uniform, to minimize wear or othereffects tending to mutilate or distort I the disk 33. Also the plungerbeing confined to reciprocal movement rather than rotational as tion ofa tool to turn the nut and force the packing tightly about the stem. Inthis manner leak- ,age varound the stem is prevented when the plungerisin an unseated position, but 'without interfering with the functioningof the fulcrum cap 29 to be presently described. It will be noted thatstem 3| also has a sliding fit through the nut 40 which adds to itsdesirably rigid support'and guidance in order to counteract componentsset up across its aXis when the handle is actuated.

A handle or lever il is provided forY operating the plunger when asupply of water is required for the tumbler. For this purpose the handleis provided with an enlarged cylindrical bifurcated end 42 within whichthe flattened end 3| of the stem 3l is pivoted, as at 4l'.

Normally the handle l!!A is in the position shown in full lines in Fig.2, with the flat surface 43 of the end 42 bearing against the centiguoussurface 44 on the end wall 45 of the fulcrum cap 29. When the handle isnow rotated about Ythe pivot 4I into the position shown in dot and dashlines, the plunger will be moved to the right because of the leverageexerted against the fulcrum, and consequently water fram pipe i3 willthen be free to ow'through port l5 into the chamber l1 from which itcannot escape except through port IB and pipe fI9 leading to the tumblerl2. And. because the handle is then in mounted by reason of its threadedconnection to housing 22, it may be turned to move it toward the leftfrom the position shown in Fig. 2 when a diminished ow of Water isdesired. It will then be further away from the pivot 4l', and the handlewill fall into a somewhat lowered position, with the result that whenthe handle is again operated to open the plunger the stroke of thelatter Will be shorter, and the continuous ilow of water will also becorrespondingly lessened.

Referring to Figs. 4 and 5, it will be seen that the fulcrum cap 29 hasbeen adjusted into an extreme position, directly opposite to that shownin Fig. 2, for the purpose of operating the plunger in a manner in whichthe handle will not assume an over-center position, and therefore willnot lock the plunger unseated, so that when released from the positionshown in Fig. 5 in which the tumbler is being supplied with water, theplunger will be free to automatically cut oi the water by resuming theposition shown in Fig. 4 due to the urge of spring 31.

It will thus be apparent that my improved valve part is adapted to meetthe requirements stated when used on the dental xture as shown anddescribed herein. There are doubtless other purposes for which it wouldbe equally useful as a part of, or as embodied in an integral valvestructure. Therefore I do not wish to be understood as limiting myselfto the exact form of construction shown. Various modifications withouterend of said housing member, the outer'endV of said plunger protrudingfrom said cap, a hana position in which its point of contact with thefulcrum cap is slightly over center, or beyond the aXis vof stem 3| atwhich point the pivot 4|' is located, the handle will remain so iXed,and

, water will ow Vcontinuously through the dedle provided with a headpivoted to said outer end of said plunger and adapted to engage saidfulcrum cap to unseat said plunger, packing-means for said plungerwithin the outer end of the housing member and covered and concealed bythe fulcrum cap, said head being fashioned to provide a surfaceengageable with said fulcrum cap when the latter is in an outwardlyadjusted position and operative when said handle'is actuated to'unseatsaid plunger, and to provide another surface engageable with saidfulcrum cap when the latter is in an inwardly adjusted position andoperative when said handle is actuated to unseat said plunger and whensaid handle is released to restore the same and thereby provide Y forautomatic'reseating of said plunger.

HARRY P. SIEGEL.

